Bulg. J. Phys. vol.42 no.3 (2015), pp. 288-295

Scalar D-brane Fluctuations and Holographic Mesons in Pilch-Warner Background

R.C. Rashkov1,2, T. Vetsov2
1Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria
2Faculty of Physics, University of Sofia, 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria
Abstract. In this paper we study the D7 probe brane scalar fluctuations in global Pilch-Warner supergravity background solution. Our choice of constant classical embeddings for the probe D-brane considerably simplifies the analysis of its fluctuations. The corresponding holographic meson spectra, obtained by the fluctuations along the transverse directions, admit equidistant structure for the higher modes and a ground state given by the conformal dimension of the operator dual to the fluctuations.

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